Overview. Caffeine is a chemical primarily found in coffee and tea, but which also appears in various sodas, sports drinks and foods. It is a stimulant, therefore causing changes in metabolism as well as increases in focus and energy. Caffeine is addictive and can cause withdrawal following cessation after frequent use.
robot. 1  a machine that resembles a human and does mechanical, routine tasks on command. 2  a person who acts and responds in a mechanical, routine manner, usually subject to another's will; automaton. 3  any machine or mechanical device that operates automatically with humanlike skill.
[1] What is robotics? In this section we define the words 'robot' and 'robotics' and look a little at the history of robots. [1.1] What is the definition of a 'robot'? [1.2] Where did the word robot come from? [1.3] When did robots, as we know them today, come into existence? 1.1 What is the definition of a 'robot'? A reprogrammable, multifunctional manipulator designed to move material, parts, tools, or specialized devices through various programmed motions for the performance of a variety of tasks Robot Institute of America, 1979 Obviously, this was a committee-written definition.